photoelectric cell
111eye — eyeable, adj. eyelike, adj. eyer, n. /uy/, n., pl. eyes, (Archaic) eyen or eyne; v., eyed, eying or eyeing. n. 1. the organ of sight, in vertebrates typically one of a pair of spherical bodies contained in an orbit of the skull and in humans… …
112photocathode — /foh toh kath ohd/, n. a cathode, typically of a cesium or sodium compound, having the property of emitting electrons when activated by light or other radiation. [1925 30; PHOTO + CATHODE] * * * ▪ electronics an element of a photoelectric… …
113radiometer — radiometric /ray dee oh me trik/, adj. radiometry, n. /ray dee om i teuhr/, n. 1. Also called Crookes radiometer. an instrument for demonstrating the transformation of radiant energy into mechanical work, consisting of an exhausted glass vessel… …
114slave — slaveless, adj. slavelike, adj. /slayv/, n., v., slaved, slaving. n. 1. a person who is the property of and wholly subject to another; a bond servant. 2. a person entirely under the domination of some influence or person: a slave to a drug. 3. a… …
115sound recording — Introduction transcription of vibrations in air that are perceptible as sound onto a storage medium, such as a phonograph disc. In sound reproduction the process is reversed so that the variations stored on the medium are converted back… …
116photoelectrode — noun Either electrode of a photoelectric cell …
117photocell — noun A photoelectric cell …
118photoelectrometer — A device employing a photoelectric cell for measuring the concentration of substances in solution …
119photocathode — pho·to·cath·ode kath .ōd n a cathode (as in a photoelectric cell) that emits electrons when exposed to light or other radiation …
120magic eye — n a ↑photoelectric cell …
